How to merge UI ?

[sheen]

Hi all,

I'm currently using this UI : Firefern's Crafting, Vendor and Dressing Room
This is a great one, larger craft panel, dressing robe and quest book

I've just find these one :
* LargerAuctionPanel
* Transparent Map Tracker v1.0

I think you can only choose one UI, but I'd like to use these 3 UI at the same time

How can I merge them to one ?
I guess I have to edit the .xml but I don't really know how to do, is somebody could explain me ?

Thanks